So my internet was out this morning and I decided to try the USB tether from my RAZR to my personal laptop then to my work laptop.
I couldn't get it to work although the razr did show it was tethering. My laptop would just not use the link. Then I disconnected the Ethernet cable to my router and BINGO it worked. Doing this forced my laptop to use the "other" available connection. I guess the OS assumed because it was getting signaling over the Ethernet that it was up when the utility was actually down.
I imagine this might happen if you are wireless connected to your router as well.
I have yet to get the Bluetooth to work. I may try Bluetooth to my laptop (as I did above) and to my Transformer Prime TF201.